UEC++ From Basics to Advanced | M23-015: Complete File Filter and Count

This video finishes the CountCode tool by implementing the file filtering and line counting engine. We connect the UI filter controls to a C++ backend that reads source files, counts lines, and produces aggregate statistics across the entire searched directory tree. The implementation reads files with FFileHelper::LoadFileToString or line-by-line streaming, counts total lines, code lines, comment lines, and blank lines using regex patterns for C-family languages. The results are displayed in the SListView with sortable columns and a summary footer showing total files and lines across all matching types. With the CountCode tool complete, you have a practical code analysis application built entirely as a Slate standalone program. This project demonstrates how to combine file I/O, recursive search, UI rendering, and data presentation into a polished desktop utility outside the Unreal Editor.